<a href="about-1.html" @@if (context.list1==='active' ) { class="active" }>
    操作指南
</a>
<a href="about-2.html" @@if (context.list2==='active' ) { class="active" }>
    常见问题
</a>
<a href="about-3.html" @@if (context.list3==='active' ) { class="active" }>
    隐私政策
</a>
<a href="about-4.html" @@if (context.list4==='active' ) { class="active" }>
    服务协议
</a>